Sara was raised in a fancy suburban neighborhood with strict parents who liked to flaunt their wealth—with his and hers Porsches, for instance. But when Sara was 12, her mother and father sat her down in the den with her siblings, and told them that their father had done a terrible thing, and their lives were about to change forever.

Host Ira Glass introduces four characters: Kay McDonald, who raised a daughter named Sue, and Mary Miller, who raised a daughter named Marti. In 1994, Mary Miller wrote letters to Sue and Marti, confessing the secret she'd kept for 43 years: The daughters had been switched at birth and raised by the wrong families.

Reporter Jake Halpern tells the story of Marti Miller and Sue McDonald, the daughters who were switched at birth, and the many complications that came with learning the truth. Jake is the author of several books and creator of the comic Welcome to the New World.

Thanksgiving 2002, the Ohm family's dinner conversation turned to the recent terrorist attacks. Alexis Ohm, the youngest daughter, made a comment that in retrospect she admits was probably the wrong thing to say with her conservative, military-veteran dad at the table...that Osama bin Laden was hot.